Drainage tube for a waterbed



FIG. 1 is a perspective view of a drainage tube for a waterbed showing my new design;

FIG. 2 is a top plan view thereof, the bottom plan view being substantially a mirror image thereof;

FIG. 3 is a side elevational view thereof, the opposite side elevation view being substantially a mirror image thereof;

FIG. 4 is a left end view taken along line 4--4 of FIG. 3; and,

FIG. 5 is a right end view taken along line 5--5 of FIG. 3. 

The ornamental design for a drainage tube for a waterbed, as shown and described. 